Define 'revival'. The Tory position in Scotland has never really been stable, so there isn't really a benchmark to measure against.
True. Conservatism in Scotland has never really been aligned to one 'conservative' party, even at it's height. Rewind fifty years and there were conservatives in the National Liberals, the Liberals, SNP (even Labour) etc. Local conservatism within local government was also unaligned for the most part. It's never been organised, so to say that it's disorganised or unstable misses the point a bit.
At the moment there is a right of centre party in Scotland (as right of centre as you can get in Scotland); it just doesn't proclaim that it is. It's the SNP. And of course the Scottish Tories are actually doing fine at Holyrood with a popular leader. They are consistently the 3rd party. It's as much as they can ever hope for.
I don't think that most of the SNP's supporters are "centre-right" though.
No, they're pretty Left-nationalist. But I guess you could call them the most conservative party considering they might be a bit to the right of Scottish Labour and far to the right of the Scottish Socialists.